AIC1521
Single High-Side Power Switch With Control
Function
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FEATURES
•
120mΩ (5V Input) High-Side MOSFET Switch.
l
500mA Continuous Load Current.
l
80µA Typical On-State Supply Current.
l
1µA Typical Off-State Supply Current.
l
Current-Limit / Short Circuit Protection.
l
Thermal Limiting Protection under Overcurrent
Condition.
l
Undervoltage Lockout Ensures that Switch is off at
Start Up.
l
Output can be Forced Higher than Input (Off-State).
l
Slow Turn ON and Fast Turn OFF.
l
Active-High or Active-Low Enable.
n
DESCRIPTION
The AIC1521 is an integrated high-side power
switch for self-powered and bus-powered Universal
Serial Bus (USB) applications. The high-side
switch is a MOSFET with 120mΩ R
DS(ON)
, which
meets USB voltage drop requirements for
maximum transmission wire length. The switch
ON/OFF is controlled by CTL pin.
Output current is typically limited to 1.0A, well
below the 5A safety requirement, and thermal
shutdown function shuts the switch off to prevent
damage under overcurrent conditions.
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APPLICATIONS
l
l
l
l
l
Motherboard USB Management.
USB Power Management.
Hot Plug-In Power Supplies.
Battery-Charger Circuit.
Power Distribution Switch.
Guaranteed minimum output rise time limits
inrush current during hot plug-in, minimizing EMI
and preventing the voltage at upstream port from
dropping excessively.
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TYPICAL APPLICATION
CIRCUIT
Ferrite Bead
A
I
C1521-
0
VCC
5.0V
IN
OUT
+
VBUS
33
µ
F
0.1
µ
F
CTL
GND
+
*
33µF
0
.
01
µ
F
D+
D-
GND
*
33
µ
F, 16V Tantalum, or
DATA
100
µ
F, 10V Electrolytic
Bold line indicate high-current traces
USB High-Side Power Switch
Analog Integrations Corporation
www.analog.com.tw
DS-1520-00
Aug 18, 00
TEL: 886-3-5772500
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
FAX: 886-3-5772510
1
AIC1521
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ORDERING INFORMATION
AIC1521-XCX
PACKAGING TYPE
O: MSOP
S: SO8
W: SOT-89-5
ORDER NUMBER
AIC1521-0CO
AIC1521-1CO
(MSOP8)
PIN CONFIGURATION
FRONT VIEW
NC 1
CTL 2
IN 3
8 NC
7 OUT
6 NC
5 GND
CONTROL POLARITY
0: Active Low
1: Active High
NC 4
AIC1521-0CS
AIC1521-1CS
(SO8)
FRONT VIEW
NC 1
CTL 2
IN 3
NC 4
8 NC
7 OUT
6 NC
5 GND
AIC1521-0CW
AIC1521-1CW
(SOT-89-5)
FRONT VIEW
1: IN
2: GND
3: OUT
4: NC
5: CTL
5
4
1
2
3
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ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V
IN
)
.......................................................… … … … .......… … ...........
7.0V
......… … … ..............… … … … … .… ...............
-40°C ~ 85°C
....................................… … … ..................
-65°C ~ 150°C
Operating Temperature Range
Storage Temperature Range
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ELECTRICAL CHARACTERISTICS
(V
specified.)
PARAMETERS
Supply Current
Control Input Voltage
Control Input Current
Output MOSFET Resistance
Output Turn-On Rise Delay
Output Turn-On Rise Time
Output Turn-Off Delay
CONDITIONS
Switch Off, OUT=Open
Switch On, OUT=Open
V
CTL
=Logic “0”
V
CTL
=Logic “1”
V
CTL
=Logic “0”
V
CTL
=Logic “1”
I
OUT
= 500mA
R
L
= 10Ω
R
L
= 10Ω
R
L
= 10Ω
IN
=
5V, Ta=25°C, unless otherwise
MIN.
TYP.
0.75
80
MAX.
2
100
0.8
UNIT
µA
V
µA
mΩ
µS
µS
2.4
0.01
0.01
120
30
500
0.2
10
1
1
180
µS
2
AIC1521
n
TYPICAL PERFORMANCE CHARACTERISTICS
Off-State Supply Current vs. Supply Voltage
12.0
11.5
20
18
16
(Continued)
Off-State Supply Current vs. Temperature
Supply Current (nA)
Supply Current (nA)
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
11.0
10.5
10.0
9.5
9.0
8.5
8.0
3.0
14
12
10
8
6
4
2
0
-40
-20
0
20
40
60
80
100
Supply Voltage (V)
Temperature (
°
C)
Output On Resistance vs. Supply Voltage
130
150
Output On Resistance vs. Temperature
Switch
On Ristance (mΩ)
125
Switch On Resistance (m
Ω
)
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
140
130
120
110
100
90
80
120
115
110
105
100
3.0
-40
-20
0
20
40
60
80
100
Supply Voltage (V)
Temperature (
°
C)
UVLO Threshold Voltage vs. Temperature
3.0
1.20
Current Limit Threshold vs. Temperature
UVLO Threshold Voltage (V)
2.9
1.15
Rising
2.8
Current Limit (A)
1.10
1.05
1.00
0.95
0.90
2.7
Falling
2.6
2.5
0.85
0.80
-40
-20
0
20
40
60
80
100
-40
-20
0
20
40
60
80
100
2.4
Temperature (
°
C)
Temperature (
°
C)
4
AIC1521
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TYPICAL PERFORMANCE CHARACTERISTICS
Output Rise Time vs. temperature
550
300
(Continued)
Output Fall Time vs. Temperature
Output Rise Time (µ S)
500
Output Fall Time (nS)
250
200
450
150
400
100
350
-40
-20
0
20
40
60
80
100
50
-40
-20
0
20
40
60
80
100
Temperature (
°
C)
Temperature (
°
C)
CTL Threshold Voltage vs. Supply Voltage
2.2
2.0
1.8
1.6
1.4
Turn On Characteristic (35
Ω
, Loading)
CTL Rising
220
µ
F
100
µ
F
CTL Falling
1.2
1.0
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
No Cap
I
OUT
, 200mA/DIV
CTL
Supply Voltage (V)
Turn On Rising Time (10
Ω
loading)
Turn Off Falling Time (10
Ω
Loading)
I
OUT
200mA/DIV
I
OUT
V
OUT
200mA/DIV
V
OUT
426
µ
S
CTL
107nS
CTL
5
ADI Reference Circuit
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